September weather forecastBiru, Indonesia

September

Weather in September

The first month of the spring, September, is still a warm month in Biru, Indonesia, with temperature in the range of an average low of 19.5°C (67.1°F) and an average high of 28.5°C (83.3°F).

Temperature

As Biru steps into September, the average high-temperature is measured at a still moderately hot 28.5°C (83.3°F), displaying minor differences from August's 27.6°C (81.7°F). Biru's average low-temperature is measured at a refreshing 19.5°C (67.1°F) during September.

Heat index

The heat index in September is computed to be a tropical 34°C (93.2°F). Ensure extra safety steps, heat exhaustion and heat cramps are likely. Long activity might lead to heatstroke.
It is important to note that the heat index values are for shaded areas and light wind scenarios. The heat index has the possibility to be enhanced by 15 Fahrenheit (8 Celsius) degrees when there is direct sun exposure.
Note: The heat index, also known as 'feels like' or 'felt air temperature', melds the effects of warmth and moisture to generate a feeling of heat. The influence of weather is personal, with varied individuals experiencing it differently due to differences in body mass, stature, and physical exertion levels. Consider the sun's direct rays and their impact; they can potentially increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for babies and toddlers. Children usually face more risks than adults as their ability to sweat is less. Additionally, their larger skin surface in relation to their petite bodies and higher heat output due to their activities increases their vulnerability.

Humidity

The months with the lowest humidity are September and October, with an average relative humidity of 81%.

Rainfall

In Biru, during September, the rain falls for 19.5 days and regularly aggregates up to 50mm (1.97") of precipitation. Throughout the year, there are 304.3 rainfall days, and 2093mm (82.4") of precipitation is accumulated.

Daylight

In September, the average length of the day is 12h and 4min.
On the first day of the month, sunrise is at 05:49 and sunset at 17:48. On the last day of September, in Biru, sunrise is at 05:34 and sunset at 17:43 WIB.

Sunshine

In Biru, the average sunshine in September is 8.5h.

UV index

January through December, with an average maximum UV index of 6, are months with the highest UV index. January through December, with an average maximum UV index of 6, are months with the lowest UV index. A UV Index of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV rays for average individuals.
Note: The maximum UV index of 6 during September leads to these instructions:
Incorporate safeguards and honour sun safety principles. Protection from skin and eye damage is obligatory. Make an effort to avoid direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation, and note that objects like parasols or canopies might not offer full sun protection. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears.

Updated: Aug 31, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

An average high-temperature, in September, in Biru, is 28.5°C (83.3°F) and the average low-temperature is 19.5°C (67.1°F). The average heat index (a.k.a. 'real feel', 'apparent temperature'), which factors the actual air temperature with the relative humidity, in September is computed to be 34°C (93.2°F).

September and October, with an average relative humidity of 81%, are the least humid months in Biru.

In September, the average relative humidity is 81%.

In Biru, in September, during 19.5 rainfall days, 50mm (1.97") of precipitation is typically accumulated.

In Biru, the average day length in September is 12h and 4min.

On the first day of September, sunrise is at 05:49 and sunset at 17:48. On the last day of the month, sunrise is at 05:34 and sunset at 17:43 WIB.

The average sunshine duration in September is 8.5h.

January through December, with an average maximum UV index of 6, are months with the highest UV index.

The months with the lowest UV index are January through December, with an average maximum UV index of 6.

In September, the average daily maximum UV index is 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to UV radiation.

Today

Tomorrow

Long-term

Year J F M A M J J A September O N D

Aug

September

Oct

Average high temperature

27.6°C

28.5°C

28.9°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

8km/h

8.1km/h

7.3km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average daylight

Average sunshine

Average sunshine days

10.8

7.3

3.9

Average UV index

Average cloud cover

44%

42%

Average visibility

8km

Average temperature in September
Biru, Indonesia

Average high temperature in September: 28.5°C

The warmest month (with the highest average high temperature) is October (28.9°C).
The month with the lowest average high temperature is July (27°C).

Average low temperature in September: 19.5°C

The months with the highest average low temperature are January and December (21.8°C).
The coldest month (with the lowest average low temperature) is August (19.2°C).

Average pressure in September
Biru, Indonesia

Average pressure in September: 1011.7mbar

The month with the highest atmospheric pressure is September (1011.7mbar).
The month with the lowest atmospheric pressure is December (1009.4mbar).

Average wind speed in September
Biru, Indonesia

Average wind speed in September: 6.7km/h

The windiest month (with the highest average wind speed) is September (6.7km/h).
The calmest month (with the lowest average wind speed) is February (4.1km/h).

Average humidity in September
Biru, Indonesia

Average humidity in September: 81%

The months with the highest relative humidity are May, June and July (86%).
The months with the lowest relative humidity are September and October (81%).

Average rainfall in September
Biru, Indonesia

Average rainfall in September: 50mm

The wettest month (with the highest rainfall) is March (310mm).
The driest month (with the least rainfall) is August (30mm).

Average rainfall days in September
Biru, Indonesia

Average rainfall days in September: 19.5 days

The month with the highest number of rainy days is March (30.6 days).
The month with the least rainy days is August (16.4 days).

Average daylight in September /
Average sunshine in September
Biru, Indonesia

Average daylight in September: 12h and 6min

The month with the longest days is December (Average daylight: 12h and 30min).
The month with the shortest days is June (Average daylight: 11h and 42min).

Average sunshine in September: 8h and 30min

The month with the most sunshine is October (Average sunshine: 8h and 48min).
The month with the least sunshine is July (Average sunshine: 6h and 18min).

Average sunshine days in September
Biru, Indonesia

Average sunshine days in September: 7.3 days

The month with the most sunshine days is August (10.8 days).
The months with the least sunshine days are February and March (0.2 days).

Average UV index in September
Biru, Indonesia

Average UV index in September: 6

The months with the highest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 6).
The months with the lowest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 6).